NATS, the UK's en-route air traffic service provider, may be able to provide some relevant information. Its contact address is: The Chief Executive, NATS, 4000 Parkway, Whiteley, Fareham, Hants P015 7FL.

Annotations

Andrew Rossindell is right to draw attention to this issue for environmental and resource depletion reasons.

This waste occurs because aviation has been overstimulated by tax concessions worth over £10 billion a year in the UK alone, at the expense of other sections of the economy. This distortion to the economy is inefficient and damaging to the environment.